Smithsonian Magazine on MSN4d
A Century Ago, Pioneering Astrophysicist Cecilia Payne-Gaposchkin Showed Us What Stars Are Made OfThe trailblazing Harvard scientist, who documented the dominance of hydrogen and helium in stars, is still inspiring ...
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After hours: March 19 at 6:36:17 PM EDT Loading Chart for TIL ...
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